I'm sure he will be back in the end of the expansion. Once we kill Garrosh, Grom Hellscream's ghost will appear and be like:

Ghost of Grom Hellscream: Whitout it's masters command, the restless horde will become an even greater threat to this world. Control must be maintained! there must always be... a warchief.Thrall: The weight of such a burden...must be mine. For there is no other... Rhonin: Thrall! You hold a grim destiny in your hands, brother but it is not your own. Thrall: Rhonin! By all that is holy...Rhonin: The manabomb's rage sealed my fate. The world of the living can no longer comfort me. Place the title upon my head, Thrall. Forevermore, I will be the leader of the Horde.

Ghost of Grom Hellscream: Whitout it's masters command, the restless horde will become an even greater threat to this world. Control must be maintained! there must always be... a warchief.
Thrall: The weight of such a burden...must be mine. For there is no other...
Rhonin: Thrall! You hold a grim destiny in your hands, brother but it is not your own.
Thrall: Rhonin! By all that is holy...
Rhonin: The manabomb's rage sealed my fate. The world of the living can no longer comfort me. Place the title upon my head, Thrall. Forevermore, I will be the leader of the Horde.

I'm sure he will be back in the end of the expansion. Once we kill Garrosh, Grom Hellscream's ghost will appear and be like:

Ghost of Grom Hellscream: Whitout it's masters command, the restless horde will become an even greater threat to this world. Control must be maintained! there must always be... a warchief.Thrall: The weight of such a burden...must be mine. For there is no other... Rhonin: Thrall! You hold a grim destiny in your hands, brother but it is not your own. Thrall: Rhonin! By all that is holy...Rhonin: The manabomb's rage sealed my fate. The world of the living can no longer comfort me. Place the title upon my head, Thrall. Forevermore, I will be the leader of the Horde.

Also, despite the joke of it being so poor in class, taking any serious touch to the fact of naming a vessel after any part of rhonin, why does that just seem irksome. Rhonin was not alliance, he was a neutral figure when dalaran was neutral.

In Tides of War, the Kirin Tor are helping protect Theramore from the Horde. When the mana bomb comes, Rhonin does something (I forget what) to draw the bomb to him and reduce the damage to Theramore. So he took a nuke to the face, and is presumed dead.

---------- Post added 2013-02-19 at 12:25 AM ----------

Good times, good times.

The structure of that quote is terrible. I hope it wasn't a direct quote.